Machine for knitting pile fabrics



Dec. 29, 1931. c. H. BREAITHWAITE l 1,838,739

MACHINE FOR' KNITTING PILE FABRICS 3 Sheets-Sheet Filed Dec. 13, 1928 ano v W m x S Q a m. w

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Dec. 29, 1931. c. H. BREAITHWAITE 1,838,739

MACHINE FOR KNITTING PILE FABRICS Filed Dec. 13, 1928 3 Sheets-Sheet 2/22 2 P 2 2/ I L\;

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if 5 B Owbam @5MM Dec. 29, 1931. c. H. BREAITHWAITE MACHINE FOR KNITTINGPILE FARICS Filed Dec. 13, 1928v 3 Sheets-Sheet 3 nnnnnnnnnnn lproveniente .to be vPatented Dec. 29, Y1931 cHAnLEs Hr BREAITHWAITE, oFJ1111:]:1nlinintente; PENNSYLVANIA .'.MACHINE ronxnrraunerrtn FABRICS .l

. appuatibnmea December 13,"..1e2ar semina. $25,703.

The principal objects of the' presentinven- Vtion are, first, to effectyan economy in the use of pile yarn; second, to produce knitted plush`or .pile fabric with a. clean'ba;ck,'thatfis, a 5 back at which no partofjthej pile' yarn' is visible; third, to produce a fabric which shallbe free from streakssuch as `are, produced by the lugs bet-Ween Which"the fabric is passedV in dial knitting machines With which l I amfamiliar; andfourth, to provide a machine adapted .to accomplish theresults above indicated. Y y

"To these'and other ends hereinafter stated or appearing the inventioncomprises the impresentlyl described and `finally claimed. 1 y In thefollowingdescription reference yv'i'll be made `totheaccompanyingfdravvings' forming part hereofand in which n Y lFigure lisa view partlyfin sectionand `'partly in elevation, more.` or lessfdiagrammatic, illustrating a knitting machine embodying features oftheinvention. ,Fig.` 2 is a top or plan vievvof the same.

'Fig Sois af diagrammatic view to Whichreference willbe hereinaftermade. n

Figs. l', 5,6 and/7 are detached highly diagrammatic views villustrativeof theoperation ofthe machine. Y n

Fig. 8 isV an elevationalview illustrative of cuttery mechanism. g 'lFig. 9Y is a transverse sectionalvievv ofthe same. u ,Fig. 10 isaupward. l y l Fig. '11 is angenlarged elevational view, of portions ofthe cutter.

Fig. 12 risa sectional view illustrating a `modiiiedform ofcuttermechanisim and p "Figs 13 and 141 are diagrammatic viewsVhereinafter referred to.

`Inthe machine about to .be described the cams do not rotate. i There isdial mechanism 1` and it includesv hooks 2 and acam 3. There is knittingcylinder mechanism and 'itincludes a "rotatable 1,needle carrying Icylinder #t and latchineedles, and af cam 6 forfthe latch needles.lowerrend', as shown, by Way vof a spider'B With the rotary element 1 ofthe dial mech`- plan view of thecutter looking Z is a shaft4 connectedat lits V amsm. rllhis' shaft passes 1thro-ugh suitable bearingsl 9, '10and 11' and isturnably mount- `ed'inthe jbearings.V At its upper endtheshaft T-fispprovdediwith atoothed Wheel 12 driven "ithroifgh shafts 413and 14:, ,and toothed 'Wheels "15., .16 and l7`,fro'nifthe sha'ft18,"Whicli bythe toothed tvheel 20 is 'driven 4from "the needlecylinder'l, inturnd-riven by toothed Wheel 2Oa 'fromf drive 'sh'aft'20?.i By these means the rotaryel'ementf the dial mechanism and G9 'ani-sm'are driven 'synchronously While-at the :same timelthe' knitted fabriccan pass ibei' tween?the` two mechanisms UWithout contactfabric doesnothave'y to besheared and With- Mm put shearingl presents a "Well finishedsmooth L ace. f-Referring tofFig.` 10,'there are fixed and Y fparallel'obliquely disposed spaced cutters 21.*.Theyareshovvn as provided on theface A of ablock 22 beveled off as at 23, Fig. 11. VThe V'faces of thevcutters are also beveledy off Ias at 24,130 rprovide clearance.11A-support is providevdffor cooperation yvith the cutter/sj, and in WFigs. 8, 9 andll itis shown asa rod 25 hav- 80 ing apointe'd en`d126`and mounted in a holder 27 or,m ore accurately, ina groove providedf .inthe holder'so as to exposel the top portion ofthe rod 25. The holder27is`made adjust- 1 able byv the slot and screw connection 28, 3 and theslide 29` in vvhich Worksv a shank "'30 connected with the block and.actedupon i by aspringfl vadjustable bythe thumb screW32. l vIn Fig/12there is shownv a 4modied form of support, andv itconsistsiof arevoluble disk of Which the rim 33 runsunfder a roller 34 and underthehook 2, otherwise Athe construction `is as has been describedinconnection with Figs. 9 and 11. i 2B fforeldescribing themode ofoperation of 95 the "machine inV detail reference is madeto Fig. 3.v'-lhesame;operations. are repeatedin the Vmachine"shovvn four times sothat a des'c'ription of one operation Will suice. l "In'thefollowingdescription, the assump- 10 tion is made that the machine is inoperation.

In Fig. 3 the pile yarn P is laid onto the hooks alone at the pointgenerally indicated by the arrow 35 which, in the revolution of theparts, is in advance of the point 36, at which the backing thread islaid onto the needles. Fig. 4 diagrammatically indicates theintroduction of the pile thread. Fig. 5 shows that the needles arelowered, not far enough to throw off the old loops and raised, and atthe saine time the hooks are drawn in toward the vertical central axisof the machine. Fig. 6 shows the result of these relative movements andillustrates that the pile thread is looped and held outside of andaround the needles and in the hooks, thus establishing its position andtension, and Fig. 6 also illustrates that, after the completion of theabove described operation on the pile thread, the back thread B has beenlaid onto t-lie needles, at point 36 Fig. 3, and that the back thread isnot engaged by the hooks 2. Fig. 7 shows a needle descending furtherthan it did in Fig. 5 and carrying pile thread P and back thread B inits closed eye and about to throw oit" the old or previously formedloops A, supported by the top of the cylinder 4. Fig. 7 also shows thatloops of pile thread are on the hooks 2, which have been projected,ready to be cut and let the fabric descend through the cylinder 4. InFigs. 13 and 14, there is diagrammatically illustrated the fact that thepile needle loops P are directly on top of the backing needle loops B.Referring to Fig. l() the dotted line 39 indicates the path of the loopsand shows that they travel somewhat crosswise of the cutters because thehooks and needles travel in a circle of which the arc is intercepted atthe cutter. The described cutter in cooperation with the other parts ofthe machine is an important factor in the production of knitted plushhaving a smooth pile face although the loops are cut in the machine.Again, as has been said, the construction of the machine is such thatthe plush face is devoid of objectionable stripe effects.

It will be obvious to those skilled in the art to which the inventionrelates that modiiications may be made in details of construction andarrangement and matters of mere form without departing from tlie'spiritof the invention which is not limited to such matters or otherwise thanthe prior art and the appended claims may require.

I claim:

l. Iii a knitting machine the combination of rotating dial mechanismincluding hooks, a rotary knitting cylinder mechanism including latchneedles, two circumferentially spaced means each adapted to introduce anindividual thread, the means for introducing the pile thread being inadvance of the means for introducing the backing thread, the cam meansof said dial mechanism and the cam means of said knitting cylindermechanism being stationary in respect to rotation and constructed andadapted to project the hooks at the iirst thread introducing means toreceive loops of pile yarn, and to retract the hooks and lower and raisethe needles between the two thread introducing means to arrange and holdthe pile thread in properly looped arrangement, and to raise the needlesat the second yarn introducing means to receive the backing thread andto project the hooks to position the pile thread for cutting and tolower the needles to throw ot previously formed loops supported on topot' lthe needle cylinder, and loop cutting mechanism for the pile loops.

2. In a knitting machine the combination of rotating dial mechanismincluding hooks,

Va rotary knitting cylinder mechanism including latch needles, twocircumferentially spaced means each adapted to introduce an individualthread, the means for introducing the pile thread being in advance ofthe means for introducing the backing thread, the cam means of said dialmechanism and the cam means of said knitting cylinder mechanism beingstationary in respect to rotation and constructed and adapted torelatively move the needles and hooks to prearrange the pile threadloops before the introduction of any backing thread and to then knitvthe two threads with pile loops on the hooks, and cutting mechanism forthe pile loops.

3. In a knitting machine having cooperating cylinder needles and dialhooks mounted for rotary movement, a cutter for the loops of pile threadcarried by the Shanks of the dial hooks, said cutter comprising aplurality of beveled teeth arranged approximately at right angles to thetangents to the circle of movement of the pile thread loops.

4. In a knitting machine having cooperating cylinder needles and dialhooks mounted for rotary movement, a frame, a cutter for the loops ofpile thread carried by the shanks of the dial hooks, said cuttercomprising a plurality of beveled teeth arranged approximately at rightangles to the tangents to the circle of movement of the pile threadloops and a spring interposed between said cutter and said frame.

5. `In a knitting machine having Cooperating cylinder needles and dialhooks mounted for rotary movement, a frame, a cutter for the loops ofpile thread carried by the Shanks of the dial hooks, said cuttercomprising a plurality of beveled teeth arranged approximately at rightangles to the tangents of the circle of movement of the pile threadloops, a spring interposed between said cutter and said frame and asupport for the outer ends of the dial hooks during the cuttingoperation.

c and beveled away from the pointof entry of` `6. In a knitting machinehaving cooperating cylinder needles and dial hooks mounted for rotarymovement, a frame, a cutter for the loops of pile thread carried by theShanks of the dial hooks, said cutter comprising a plurality of beveledteeth arranged approximately at right angles to the tangents to thecircle of movement of the pile thread loops, a spring interposed betweensaid cutter and said frame and a pointed rod arranged be-V neath saidcutter and forming a support for the outer ends of the dial hooks duringthe cutting operation.

7. In a knitting machine having cooperatingl cylinder needles and dialhooks mount ed for rotary movement, a cutter for the loops of pilethread carried by the shanks of the dial hooks, said cutter'comprisingal plurality of beveled teeth arranged approximately atright angles tothe tangente to the circle of movement of the pile thread loops the pilethread loops and a pointed rod arranged beneath said cutter and forminga support for the outer ends ofthe dial hooks during the cuttingoperation.

CHARLES H. BREAITHWAITE

